Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-09-28
Phys. Rev. B 66, 045323 (2002)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
12 pages, 14 figures, submitted to Phys. Rev. B
Scientific paper
10.1103/PhysRevB.66.045323
Results are presented of detailed numerical calculations for the spin excitation spectra of a two-dimensional electron gas confined in a quantum well of finite width w, at magnetic fields corresponding to the fractional and integral fillings of the lowest and of excited Landau levels. Spin waves and skyrmions are identified, and their mutual interactions are studied at filling factors nu=1/3, 1, 3, and 5. The smallest skyrmions at nu=1/3 are equivalent to composite fermion charged excitons X_CF^(+/-). Bose condensates of nearly noninteracting spin waves and Laughlin correlations between finite-size skyrmions are found at nu=1 and 1/3 and, for w larger than about two magnetic lengths, also at nu=3 and 5. A general criterion for the occurrence of skyrmions at odd integral fillings and at Laughlin fractional fillings of the lowest Landau level is given in terms of the interaction pseudopotentials. This explains the dependence of skyrmion states on w observed in excited Landau levels.
Quinn John J.
Wojs Arkadiusz
No associations
LandOfFree
Spin excitation spectra of integral and fractional quantum Hall systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Spin excitation spectra of integral and fractional quantum Hall systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spin excitation spectra of integral and fractional quantum Hall systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-155121